How do I add a CSS class to a BoundField, so I can find it with jQuery?

I want to add a class name to some of my BoundFields in the GridView control; so that once the GridView is data-bound and rendered I can obtain something like:

<td class="Tag1">Some data came from data source</td>

The purpose of doing such a thing is to be able to find all the elements that are "Tag1" in this way:

var allTag1td = $('td.Tag1');

So, how can I add this class to the BoundField so that it is rendered in this way?